Lattice effect of strong electron correlation: Implication for ferroelectricity and superconductivity

Journal Article · Fri Sep 03 04:00:00 EDT 1993 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.261.5126.1307· OSTI ID:5471506

Egami, T ^[1]; Ishihara, S; Tachiki, M ^[2]

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1. Tohoku Univ., Sendai (Japan) Univ. of Pennsylvania, Philadelphia, PA (United States)
2. Tohoku Univ., Sendai (Japan)

Much theoretical work has been devoted to understanding the role of strong electron correlations in high-temperature superconductivity mainly through magnetic interactions, but the possible role of electron correlation in ferroelectricity of metal oxides has not received attention. Diagonalization of a simple many-body, tight-binding Hamiltonian shows that the electron-lattice interaction is dramatically enhanced in some cases by strong electron correlation because of deformation-induced charge transfer. This effect may be closely related to ferroelectricity and superconductivity in transition metal oxides.

• OSTI ID: 5471506
• Journal Information: Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 261:5126; ISSN SCIEAS; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CORRELATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON CORRELATION
FERROELECTRIC MATERIALS
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS